package thread;

public class SyncDemo4 {
    public static void main(String[] args) {
        Boo b1 = new Boo();
        Thread t1 = new Thread(){
            public void run() {
                b1.methodA();
            }
        };
        Thread t2 = new Thread(){
            public void run() {
                b1.methodA();
            }
        };
        t1.start();
        t2.start();
    }
}

class Boo{
    public synchronized void methodA(){
        try {
            Thread thread = Thread.currentThread();
            System.out.println(thread.getName()+"正在执行A方法...");
            Thread.sleep(5000);
            System.out.println(thread.getName()+"执行A方法完毕");
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
    public void methodB(){
        synchronized (this){
            try {
                Thread t = Thread.currentThread();
                System.out.println(t.getName()+"正在执行B方法...");
                Thread.sleep(5000);
                System.out.println(t.getName()+"执行B方法完毕");
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }

    }
}